text: /* setsig.c - Set a signal handler, trying to turning on the SA_RESTART bit
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Free Software
    Foundation, Inc.
  
    This file is part of GNU Inetutils.
  
    GNU Inetutils is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or (at
    your option) any later version.
  
    GNU Inetutils is distributed in the hope that it will be useful, but
    WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.
  
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see `http://www.gnu.org/licenses/'. */
  
  /* Written by Miles Bader.  */
  
  #include <config.h>
  
  #include <stdlib.h>
  
  #include <signal.h>
  
  /* This is exactly like the traditional signal function, but turns on the
     SA_RESTART bit where possible.  */
  sighandler_t
  setsig (int sig, sighandler_t handler)
  {
  #ifdef HAVE_SIGACTION
    struct sigaction sa, osa;
    sigemptyset (&sa.sa_mask);
    sigemptyset (&osa.sa_mask);
  # ifdef SA_RESTART
    sa.sa_flags |= SA_RESTART;
  # endif
    sa.sa_handler = handler;
    if (sigaction (sig, &sa, &osa) < 0)
      return SIG_ERR;
    return osa.sa_handler;
  #else /* !HAVE_SIGACTION */
  # ifdef HAVE_SIGVEC
    struct sigvec sv, osv;
    sigemptyset (&sv.sv_mask);
    sigemptyset (&osv.sv_mask);
    sv.sv_handler = handler;
    if (sigvec (sig, &sv, &osv) < 0)
      return SIG_ERR;
    return osv.sv_handler;
  # else /* !HAVE_SIGVEC */
    return signal (sig, handler);
  # endif	/* HAVE_SIGVEC */
  #endif /* HAVE_SIGACTION */
  }
  